year = int(input("请输入年份："))
if(year % 4 == 0 and year % 100 != 0 or year % 400 == 0):
    # print(f"{year}年是闰年！")
    print("{}年是闰年".format(year))
else:
    # print(f"{year}不是闰年！")
    print("{}不是闰年".format(year))